Figure 1: (A) Mean bacterial concentrations (in log CFU/g or 100 mL) of samples without (dotted bars) and with Salmonella (hatched bars), error bars indicate the standard deviations and different letters indicate statistically significant differences within one microbiological parameter.
(B) Salmonella prevalence in samples belonging to different E. coli concentrations, grouped into classes of tenfold differences, error bars indicate the 95 % confidence intervals.
(C) Salmonella prevalence in samples belonging to different coliforms concentrations, grouped into classes of tenfold differences, error bars indicate the 95 % confidence intervals.